Lenyuk, M. P., and N. P. Oleinik. “On a Class of Hybrid Integral Transformations (Bessel-Fourier-Bessel-. -Fourier-Bessel) on the Polar Axis With $2n$ Junction Points”. Ukrains’kyi Matematychnyi Zhurnal, vol. 45, no. 8, Aug. 1993, pp. 1096–1103, https://umj.imath.kiev.ua/index.php/umj/article/view/5905.